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Study finds rising temperatures increase risk of unhealthy ozone levels absent sharp cuts in precursors

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Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new work led by the National Center for Atmospheric Research (NCAR). The RCPs were chosen to represent a broad range of climate outcomes, based on a literature review. Ozone formation.

Ozone 199
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Study finds global rivers and streams emitting 3x IPCC estimates of the GHG N2O

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Scientists report in an open access paper this week in the journal Proceedings of the National Academy of Sciences (PNAS) that river and stream networks are the source of at least 10% of human-caused nitrous oxide emissions to the atmosphere. This new global emission estimate is startling. Beaulieu et al. PNAS doi: 10.1073/pnas.1011464108.